| immovable(adjective, fixed, stubborn) |
| militant(adjective, firm, stiff, unyielding) |
| persevering(strong, certain, definite, resolved, unalterable) |
| persistent(strong, certain, definite, resolved, unalterable) |
| positive(certain, definite, resolved) |
| prevailing(strong, certain, definite, resolved, unalterable) |
| resolved(strong, certain, definite, unalterable) |
| specific(strong, certain, definite, resolved, unalterable) |
| stand one's ground(verb, stick) |
| stated(strong, certain, definite, resolved, unalterable) |
| stern(firm, unyielding) |
| stick to one's guns(verb, stick) |
| stiff(firm, unyielding) |
| stipulated(strong, certain, definite, resolved, unalterable) |
| sure(strong, certain, definite, resolved, unalterable) |
| true(strong, certain, definite, resolved, unalterable) |
| unflinching(strong, certain, definite, resolved, unalterable) |
| ungiving(adjective, firm, stiff, unyielding, immovable) |
| unqualified(strong, certain, definite, resolved, unalterable) |
| unshaken(strong, certain, definite, resolved, unalterable) |